ABSTRACT
For the experiments presented in this paper a constant deformation was chosen. When the load which kept the specimen at a constant strain is removed after aging, the specimen recovers to it’s new equilibrium state. In general this state is not identical to the state before loading. The remaining deformation is called set (Gent 2012). More precisely the compression set describes the ability to recover from a compressed state, while tension set describes the ability to recover from a tensile state. In theory, given the right temperature and time, the set can be equal to the deformation applied during aging (Achenbach 2000).
